Shaker mechansim for mill machinery



Aug. 7, 1923. 1,463,930 F. J. TEMPLE SHAKER MECHANISM FOR MILL MACHINERY Filed Oct. 21 1920 INVENTOR l atented Aug. 7, T923.

lhlhllTlEl nan FRANK J'. TEMPLE, OF DECATUR, ILLINOIS.

SHAKER MEGHANISIVZ FOR MILL MACHINERY.

Application filed. October 21, 1920. Serial No. 418,406.

To all whom it may concern:

Be it known that I, FRANK J. TEMPLE, a citizen of the United States, a resident of Decatur, in the county of Macon and State of Illinois, have invented new and useful Improvements in Shaker Mechanism for Mill Machinery, of which the following is a specification.

This invention has reference to new and improved shaker mechanism for cleaning machines, separators and mill. machinery of different kinds, wherein a shaker forms a part. a

The principal object of the invention is to provide means for imparting a reciprocatory motion to the shaker or screen, and in such a manner as will do away entirely with any vibration of the machine, which, as is well understood soon shakes the machine to pieces.

It is a common practice, so far as I am aware, to reciprocate the shaker or screen in machines of the character referred to by a shaft on which is arranged one or more eccentrics connected with the shaker screen by positively connected bars or straps which must make a full stroke forward and return with each revolution of the eccentric or eccentrics, and on the shaft is usually carried one or more balance wheels. This character of construction will jar the ma chine unnecessarily, even though the balance wheels are used, and sooner or later the machine is racked to pieces, and unless very firm foundations are employed the vibration of the machine frame is trans mitted to diflerent parts of the building and to other machines.

My invention provides for an easy and free reciprocatory movement being imparted to the shaker or screen, and eliminates entirely any vibration to the machine frame.

That the invention may be more fully understood, reference is had to the accompanying drawings forming a part of the invention, in Which:

F ig. 1 is a side. elevation, partly in section, of a machine including a shaker or screen, showing my improved means for reciprocating the shaker or screen;

F ig. 2 is a front elevation of Fig. 1;

Fig. 3 is a detail view showing one form of cam on the operating shaft for imparting movement to the shaker or screen.

Like characters of reference denote corresponding parts throughout the figures.

In Figs. 1 and 2 a conventional form of machine frame is shown, and includes the longitudinal and transverse floor sills or beams 1 and 2, and similar head sills or beams 3 and 4-. The floor sills or beams and the head sills or beams are connected by the beams or standards 5, and such beams or standards are braced by the side connecting beams 6. The positions of the head sills or beams 4: are such as to support, orefer ably flexible straps 7 which depend therefrom and sustain the weight of the shaker or screen 8 by being connected to suitable brackets 9 attached thereto. The straps 7 not only sustain the weight of the shaker or screen 8 but also permit the shaker or screen to be reciprocated back and forth, the straps moving therewith, as will be understood.

The means for imparting reciprocal movement to the shaker or screen 8 comprises a transverse shaft 10 journaled in suitable bearings 11 secured to the beams or standards 5, and operated from any suitable source of power and by suitable connections. On said shaft are preferably carried a pair of spaced cam members 12 which rotate against the surfaces of rollers 13 made of suitable material, and carried on spindles l l journaled in brackets 15 secured to the base of the shaker or screen 8. Cover plates 16 protect the cams and rollers from dust and dirt. The cams illustrated are what may be termed four point cams, although they may be otherwise constructed. It will be understood, that if the cams 12 are made as shown, and the shaft 10 is rotated at the rate of three hundred revolutions per minute that the shaker or screen will be caused to vibrate at twelve hundred strokes per minute. Changing the cams so that they are provided with one or more points, it will be understood will vary the vibrations of the shaker or screen, and I, therefore, do not wish to be limited to the precise details of cams shown.

The cam members 12 act against the resistance of coil springs 17 arranged on either side of the shaker or screen 8. Said springs bear between brackets 18 on the shaker or screen and brackets 19 secured to the side beams 6 of the frame. Each bracket 18 has a lug 20 to receive one end of a spring, and the opposite end of each spring engages a lug 21 on a member 22 adju'stably held by a screw 23 threaded through the bracket 19. This arrangement of resilient means to keep the rollers 13 in constant bearing relation with the cams 12 is of a very simple character, yet efieetive and requires little or no attentionf The operation of the device, as will be understood, is for the cam members to rotate against the rollers 18 moving the shaker or screen 8' rearwardly, slightly compressing the springs 17, which, when the pressure is released expand returning the shaker or screen in the opposite direction. The springs acting a yielding 'mann'er'to keep the rollers 13 constantly bearing against the cam rollers 12. The result of the entire action, is to give a rapid but smopth and easy reciprocal movement to the shaker or screen, without imparting any vibratory movement to the frame of the machine.

While I have shown the invention applied to one form of mill machine, it is to be uns qd hat it m y be p i d a d p te equally as well on other and different machines, where a shaker, screen or equivalent appliance is used. I

WVhat I claim is 1. In a machine of the character described, in combination, with a resiliently supported shaker-screen, brackets connected to the lower edge of one end of said screen and having overlying protecting cover plates, rollers journaled in said brackets beneath said cover plates, an operating shaft, multiple point cams on said shaft and in contactual' relation with said rollers, and yielding means between the screen and frame-work to hold the rollers in contact with said cams.

2. In a machine of the character described, in combination, with a resiliently supported shaker-screen, brackets connected to i the lower edge of one end of said screen and having overlying protecting cover plates, rollers journaled in said brackets beneath said cover plates, an operating shaft, multiple point cams on said shaft and in contactual relation with said rollers, brackets attached to said screen, other brackets attached to the frame-work, springs bearil lg between said brackets to hold the rollers in cont-act with said cams, and means to increase the tension in said springs;

,In witness whereof, I have'hereunto affixed my hand.

FRANK J. TEMPLE, 

